21. While preparing an earned value analysis (EVA) for a project sponsor, the project manager provides the following information in the latest project report: Approved work package cost estimates: US$9,500 Contingency reserves: US$500 - Management reserves: 10% of contingency resentes Percent complete of the project: 50% Planned percent of the project: 40% Actual cost (AC) of the project: US$4,500 According to the project status, the current budget at completion (BAC) is considered achievable. What value represents the cost performance required for the remaining work to keep the project cost goal within the baseline? A. 0.91 B. 0.88 C. 0.64 D. 1.25